Research Papers/Topics in Horticulture

Effect of Planting Date and Variety of Cowpea [Vigna UNGUICULATA (L.)Walp.] On Green Pod Production

ABSTRACT  A study was carried out in 2012 in a Sudan savanna ecology in Ghana aimed at identifying the optimal planting dates and suitable cowpea varieties for green pod production. Six planting dates were considered starting from the onset of the rainy season (20th June, 30th June, 12th July, 25th July, 2nd August and 12th August), and four improved cowpea varieties released by Savanna Agricultural Research Institute (SARI) of the Council for Scientific and Industrial Research (CSIR) as...

Pre- and Postharvest Factors Affecting Quality and Safety of Pepper (Piper nigrum L.)

AbstractThe quality and safety of pepper (Piper nigrum L.) are a function of crop management practices, harvest maturity, harvesting methods and subsequent handling after harvest, including storage conditions and processing methods. The review shows that volatile oil decreases with shade intensity (15–30%). Essential oil, oleoresin, piperine and monoterpenes (thujene, α-pinene, sabinene, limonene, α-phellandrene and linalool) increase with altitude, while β-caryophyllene and total p...

Potentials of Spices Diet-Derived Polyphenols in Modulating the Self- Renewal of Stem Cells

AbstractOver many centuries, spices have been and are globally utilized in foods and drinks, as well as in pharmaceuticals industries. Spices are rich in health-beneficial chemical constituents that include diet- derived polyphenols, terpenes, polysaccharides, lipids, organic acids, and raw fibres. Stem cells can self- renew and differentiate into major cell types. However, malignant stem cells can invade and kill nearby tissue as well as spread to other body parts through the ...

Morphological Characterization and Yield of Pepper (Piper nigrum L.) Types Grown in Morogoro District, Tanzania

AbstractBackground: Pepper (Piper nigrum L.) is among key spice crops grown in Morogoro district of Tanzania. Most of the pepper types grown in the district are only known by their local names as Babu kubwa, Babu ndogo, Babu kati and Ismailia. This may limit information on germplasm collection or genetic resource for plant improvement and trade in markets with variety specifications. The aim of this study was to generate preliminary information of the pepper types based on...

Establishment of the Causal Agent(s) of Spike Shedding and Stem Wilting of Pepper (Piper nigrum L.) in Morogoro District, Tanzania

Pepper (Piper nigrum L.) serves as a source of income to smallholder spice farmers in Morogoro district of Tanzania. Recently, spike shedding and stem wilting of pepper plants were reported to cause about 30% yield loss of the crop. 'is study was undertaken to identify the causal agent(s) of the problems. 'ree pepper gardens in each of the four hamlets (Nyange, Doga, Tandai, and Lukenge) in Tandai village (Kinole ward) were surveyed, and plant tissue and soil samples were colle...

Extent of Spike Shedding and Stem Wilting of Pepper (Piper nigrum L.) in Morogoro District, Tanzania

AbstractBackground: Pepper (Piper nigrum L.) is an important spice produced by small-scale farmers in Morogoro district of Tanzania for both local and export markets. Recently, farmers have reported a decline in crop productivity due to spike shedding and stem wilting of pepper plants. The study was conducted to obtain baseline information on the extent of the disorders.Methods: An altitudinal transect survey was conducted in Morogoro district from October to November 2018. Data were coll...

Comparative Study of the Biochemical Properties of the Fruits of Wild (Lycopersicon pimpinellifolium Jusl. (Mill.)) and the Cultivated (L. esculentum Mill.) Tomato Cultivars in Nigeria

AbstractThe fruits of three cultivars of the cultivated tomato (Lycopersicon esculentum) and the wild species (L. pimpinellifolium) were analysed and compared for their biochemical properties.  Ripe fruits at the orange-red stage were used for all the analyses. Both the cultivated and the wild tomato species showed high moisture contents.  The wild tomato cultivar had a higher crude protein content and quantitatively represents the better source of protein intake when compared ...

Effect Of Saline Water On Germination And Vegetative Growth Of Faba Bean (Vicia Faba L.)

AbstractThis study was carried out to investigate the effect of different concentrations of sodium chloride (NaCl) solution on the germination and the vegetative growth of faba bean (Vicia faba L.) cv Agabat. The NaCl solution concentrations used were 0.00 ( distilled water as a control), 0.032, 0.063, 0.125, and 0.250 molar. The daily and final germination percentage was not significant affected by the 0.00, 0.032 and 0.063and 0.125 M. The final germination perc...

Effect of Some Fertilizer Types on Growth, Yield and Quality of Cucumber (Cucumis sativus L.) Unde r Cooled Plastic Tunnels Conditions

The study was carried out thru 7 July - 1 October of 2015 in a cooled plastic tunnel (29ºc Temperature and 85%, Relative humidity) at Al Bagair area, in the northern part of Al Gazera State, Sudan, to study the effect of organic (Elkhierat), bio-fertilizer (Elixir) and chemical (NPK) and some micronutrients ( Fe, Zn and B at 200, and 100 ppm, respectively) fertilizers and their combinations on growth, yield and quality of cucumber (Cucumis sativus L.) variety (F...

Evaluation Of Entomopathogens And Plant Extracts As Options For Integrated Pest Management Of Tuta Absoluta Meyrick (Lepidoptera: Gelechiidae) For Enhanced Tomato Productivity In Rwanda

ABSTRACT Tomato (Solanum lycopersicum L.) is an economically and nutritionally important crop in Rwanda. However, its production is threatened by the invasive tomato leaf miner (Tuta absoluta Meyrick) since 2015. Options for integrated pest management (IPM) for its control under Rwandan conditions have not been developed. The main objective of this study was to contribute to enhanced tomato productivity and fruit quality in Rwanda through evaluation of entomopathogens and plant extracts...

Bioefficacy Of Lion’s Ear (Leonotis Nepetifolia) And African Basil (Ocimum Gratissimum) Extracts Against Two-Spotted Spider Mite (Tetranychus Urticae) On French Beans (Phaseolus Vulgaris L)

ABSTRACT French bean is a major export vegetable crop in Kenya that is currently facing a steady decline in production. Two-spotted spider mite, (Tetranychus urticae Koch) is one of the major pests that has contributed to the fluctuations in French beans production. The conventional management of this pest using miticides has caused serious environmental and safety concerns particulary in the export market. Plant-based products provide safe alternatives that can be included in integrate...

Effect Of Aloe (Aloe Vera) Leaf Extract Coating On Quality And Shelf Life Of Mango (Mangifera Indica L.) Fruits At Two Controlled Temperature Levels

ABSTRACT Mango (Mangifera indica L.) is a popular and economically important tropical fruit throughout the world due to its excellent visual and eating qualities and nutritional composition. But the fruit is highly perishable and utmost care is required in handling to reduce postharvest losses. Trade in mangoes has been limited because of its highly perishable nature and its susceptibility to low temperature injury, physical injury and post-harvest diseases. Approaches to extending fresh...

Effects Of Agronet Cover And Companion Planting With Basil (Ocimum Basilicum L.) On Whitefly (Bemisia Tabaci Gennadius) Infestation, Yield And Quality Of Tomato (Solanum Lycopersicum L.)

ABSTRACT Tomato (Solanum lycopersicum L.) is a major vegetable crops, and is ranked second at 14% of total value of exotic vegetables produced in Kenya after potato with a value of 55%. It is predominantly grown by small to medium scale growers in open fields. However, open field tomato production faces many challenges including weather extremes, diseases and insect pests. The whitefly (Bemisia tabaci Gennadius), is one of the major pests of tomato capable of causing up to 80% loss in y...

Optimizing Micropropagation Protocols For Wild Blackberry (Rubus Sp)

ABSTRACT Blackberry is a crop of great economic potential but it has not been exploited commercially in Kenya. Breeding and commercial production of blackberry requires rapid propagation which is not possible through the traditional seed and vegetative techniques. This study aimed at developing an efficient protocol for rapid multiplication of blackberry (Rubus sp). The study comprised of seven separate experiments to establish the best sterilization protocol, explant size, source of ex...

Evaluation Of Agronets On Microclimate Modification, Insect Pest Control And Cabbage (Brassica Oleraceae Var.Capitata) Crop Performance

ABSTRACTThis study was done to evaluate the effects of agronets on insect pests and crop performance on cabbage production under Kenyan conditions. Two experiments were conducted over a span of two seasons at the Horticulture Research and Teaching Field, Egerton University. The objectives were to determine the effects of agronets on (1) microclimate modification, (2) insect pest population and damage, and (3) the subsequent effect on seedling performance, crop growth, yield and quality of cab...


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